Challenger-A Firing Range
Sometimes the only way a Starfleet officer or crewman can vent his frustration is through the barrel of a phaser rifle. The phaser range is located on deck 8. The phaser range is heavily shielded, the walls being composed of a highly refined Duranium alloy, which can absorb setting 16 phaser blasts without taking a scratch.
Normal phaser recreation and practice is used with a type II phaser set to level 3 (heavy stun). The person stands in the middle of the room, with no light except for the circle in the middle of the floor that the person is standing in. Colored circular dots approximately the size of a human hand whirl across the walls, and the person aims and fires. After completing a round, the amounts of hits and misses, along with the percentage of accuracy is announced by the ship's computer.
The phaser range is also used by security to train ship's personnel in marksmanship. During training, the holo-emitters in the phaser range are activated, creating a holographic setting, similar to what a holodeck does. Personnel are "turned loose" either independently or in an Away Team formation to explore the setting presented to them, and the security officer in charge will take notes on the performance of each person as they take cover, return fire, protect each other, and perform a variety of different scenarios. All personnel on Sovereign class are tested every six months in phaser marksmanship.
There are 25 levels of phaser marksmanship. All personnel on Sovereign-class vessels are trained in the operation of phaser types I and II up to level 14. All security personnel on Sovereign class must maintain a level 17 marksmanship for all phaser types. The true marksman can maintain at least an 80% hit ratio on level 23. The Sovereign class carries both the standard phaser rifle and the new compression phaser rifles.